Reported Reactions

Drugs › Penicillin-class antibacterial

Brand name · Amoxicillin oral susp

Amoxil: adverse event reports filed with FDA

535 reports list it as a suspect or interacting product, 2004–2026. Class: Penicillin-class antibacterial. Also reported as Amoxil /00249601/, Amoxil /00249602/.

535
reports as suspect product
0% of all reports · about 24 a year
3
reports, 12 months to June 2026
2 in the 12 months before
58.1%
marked serious by the reporter
81% across the class
4.1%
record death among outcomes, as reported
22 reports · not verified by FDA

Between February 2004 and February 2026, 535 adverse event reports received by FDA list the brand name Amoxil (amoxicillin oral susp) as a suspect or interacting product. Reports that mention it only as a concomitant medication (1,196) are left out of every figure here.

In the 12 months to June 2026, 3 reports listed it, up 50% from 2 in the 12 months before. FDA releases FAERS data quarterly, so the newest months are incomplete and grow in later releases. Over its reporting history that is about 24 reports a year and 0% of the 20,646,523 reports in the database, and 0.8% of the reports for the penicillin-class antibacterial class. How many people take it is not in the data, so a count is not a rate of occurrence.

The reactions recorded most often are drug hypersensitivity (20%), rash (8.8%) and diarrhoea (5%). A report can list several reactions, so shares add to more than 100%; 230 different terms appear across these reports. Drug hypersensitivity is recorded in 20% of these reports, a larger share than in the median penicillin-class antibacterial drug (9%).

58.1% of the reports are marked serious by the reporter (81% across the class); 4.1% record death among the outcomes and 19.3% record hospitalisation, as reported. 41.3% of the reports came from consumers, and the largest patient age group is 18 to 44 (17.2%). FDA states that "a causal relationship cannot be established between product and reactions listed in a report" and that for any given report "there is no certainty that a suspected drug caused the event."

Reports by month, five years

023Jul 2021: 1Aug 2021: 1Sep 2021: 1Oct 2021: 1Nov 2021: 3Dec 2021: 02022Jan 2022: 0Feb 2022: 2Mar 2022: 0Apr 2022: 2May 2022: 0Jun 2022: 1Jul 2022: 0Aug 2022: 0Sep 2022: 2Oct 2022: 0Nov 2022: 1Dec 2022: 02023Jan 2023: 0Feb 2023: 1Mar 2023: 1Apr 2023: 0May 2023: 2Jun 2023: 1Jul 2023: 2Aug 2023: 3Sep 2023: 3Oct 2023: 0Nov 2023: 2Dec 2023: 02024Jan 2024: 0Feb 2024: 1Mar 2024: 0Apr 2024: 0May 2024: 2Jun 2024: 0Jul 2024: 0Aug 2024: 0Sep 2024: 1Oct 2024: 0Nov 2024: 0Dec 2024: 02025Jan 2025: 0Feb 2025: 1Mar 2025: 0Apr 2025: 0May 2025: 0Jun 2025: 0Jul 2025: 0Aug 2025: 1Sep 2025: 0Oct 2025: 0Nov 2025: 0Dec 2025: 12026Jan 2026: 0Feb 2026: 1Mar 2026: 0Apr 2026: 0May 2026: 0Jun 2026: 0

Reports by the month FDA received them. FDA releases FAERS data quarterly, so the newest months are incomplete and grow in later releases.

By year received

032632004: 2520042005: 492006: 632007: 4520072008: 282009: 192010: 2520102011: 202012: 122013: 1820132014: 282015: 122016: 2520162017: 272018: 262019: 4420192020: 252021: 132022: 820222023: 152024: 42025: 320252026: 1

2026 covers reports received through June 2026 only.

Reactions recorded in the reports

share of Amoxil reports recording the termmedian drug in penicillin-class antibacterial

  1. Drug hypersensitivityan allergic-type reaction to a medicine20%107
  2. Rashskin rash8.8%47
  3. Diarrhoealoose or frequent stools5%27
  4. Pruritusitching4.5%24
  5. Pyrexiafever4.5%24
  6. Urticariahives4.3%23
  7. Drug interactionan interaction between medicines3.7%20
  8. Vision blurredblurred vision3.4%18
  9. Fatiguetiredness3.2%17
  10. Dyspnoeashortness of breath3%16
  11. Hypersensitivityan allergic-type reaction3%16
  12. Vomitingbeing sick3%16
  13. Dizzinesslight-headedness or unsteadiness2.8%15
  14. Alanine aminotransferase increasedraised liver enzyme (ALT)2.6%14
  15. Back painback pain2.4%13
  16. Burning sensationa burning feeling2.4%13
  17. Erythemaskin redness2.4%13
  18. Nauseafeeling sick2.4%13
  19. Paraesthesiatingling or pins and needles2.2%12
  20. Cataract subcapsular2.1%11
  21. Headachehead pain2.1%11
  22. Anaemialow red blood cells1.9%10
  23. Cystoid macular oedema1.9%10
  24. Diabetes mellitus inadequate controldiabetes not well controlled1.9%10
  25. Diabetic retinopathy1.9%10
  26. Episcleritis1.9%10
  27. Eye paineye pain1.9%10

Top 30 of 230 MedDRA preferred terms recorded across these reports, with a plain-language gloss where one is available. One report can record several terms. The hollow bar is the median share across the 15 drugs in the penicillin-class antibacterial class; it describes the reports, not the patients. FDA states that adverse event reports "represent a small percentage of total usage numbers of a product", that "common products may have a higher number of adverse events due to the higher total number of people using the product", and that the data "by themselves are not an indicator of the safety profile of the drug or biologic."

Outcomes recorded

Death4.1%22
Life-threatening6.5%35
Hospitalisation (initial or prolonged)19.3%103
Disability1.1%6
Congenital anomaly0.6%3
Other serious39.3%210
Not serious41.9%224

Outcome flags as the reporter set them; a report can carry several, and "other serious" is FDA's own category for serious reports outside the named outcomes. Grey bar: all 64,409 reports in the class. FDA has not verified any outcome and states that the reports "cannot be used to estimate the incidence of these events."

Patients and reporters

Patient age

Under 25.8%31
2 to 1110.3%55
12 to 172.1%11
18 to 4417.2%92
45 to 6416.6%89
65 to 747.9%42
75 and over9.5%51
Age not given30.7%164

Patient sex

Female57.4%307
Male30.7%164
Not given12%64

Who reported

Physician21.5%115
Pharmacist7.9%42
Other health professional18.7%100
Lawyer0%0
Consumer or non-health professional41.3%221
Not given10.7%57

Age and sex as stated in the report; the reporter's qualification is the primary source recorded by FDA. 43.7% of reports give the United States as the country of the event or reporter.

Reason for use recorded

Indication as recorded (MedDRA)ReportsShare
Ear infection132.4%
Ill-defined disorder101.9%
Sinusitis81.5%
Tooth abscess81.5%
Pharyngitis71.3%
Helicobacter infection61.1%

The indication field is filled in by the reporter and is often blank; shares are of all 535 reports.

In context

MeasureAmoxilPenicillin-class antibacterialAll reports
Reports as suspect product53564,40920,646,523
Share of that pool—0.8%0%
Reports, latest 12 months3—1,332,454
Marked serious58.1%81%57.4%
Death recorded among outcomes, per 1,000 reports418291
Hospitalisation recorded, per 1,000 reports193406213
Consumer-filed share41.3%18.4%45.8%
Top term, share of reportsDrug hypersensitivity 20%median 9%0.9%

Shares are of reports, not of patients treated. The number of people taking a product is not in the data, so none of these figures is a rate, and differences between columns reflect who takes a product, who reports and how long it has been sold. FDA states that adverse event reports "represent a small percentage of total usage numbers of a product", that "common products may have a higher number of adverse events due to the higher total number of people using the product", and that the data "by themselves are not an indicator of the safety profile of the drug or biologic."

Other drugs in the penicillin-class antibacterial class

DrugName typeReportsLatest 12 monthsMarked serious
Amoxicillingeneric31,9842,31183.8%
Augmentinbrand9,43641272.2%
Piperacillin and tazobactamgeneric9,30758296.6%
Ampicillingeneric3,50520590%
Zosynbrand2,3595181%
Penicillin v potassiumgeneric1,2856336.3%
Penicillin ggeneric1,0457379%
Penicillin g sodiumgeneric1,0458025.6%
Bicillin L-Abrand89158111.6%
Unasynbrand7732290.9%
Ampicillin sodium, sulbactam sodiumgeneric5677792.9%
Ampicillin and sulbactamgeneric5622194.3%
Ampicillin sodiumgeneric558943.7%
Oxacillingeneric5572294.3%

Ordered by report count for navigation only. FDA states that adverse event reports "represent a small percentage of total usage numbers of a product", that "common products may have a higher number of adverse events due to the higher total number of people using the product", and that the data "by themselves are not an indicator of the safety profile of the drug or biologic." A brand and its generic are separate rows because reporters name them separately.

Questions about Amoxil reports

How many adverse event reports has FDA received for Amoxil?

535 reports list Amoxil as a suspect or interacting product in the openFDA FAERS release of 28 Sep 2026, covering reports received through June 2026. 3 of them arrived in the latest 12 months. Another 1,196 list it only as a concomitant medication.

What reactions are recorded in Amoxil reports?

drug hypersensitivity (20%), rash (8.8%), diarrhoea (5%), pruritus (4.5%) and pyrexia (4.5%). These are MedDRA preferred terms coded from what the reporter described; a report can list several, and a term's presence is not a finding that Amoxil was responsible.

How serious are the reports?

58.1% are marked serious by the reporter. Among the outcomes recorded, 4.1% of reports include death and 19.3% include hospitalisation. FDA has not verified these outcomes and states that the reports "cannot be used to estimate the incidence" of the events.

Who files these reports?

consumer or non-health professional (41.3%), physician (21.5%) and other health professional (18.7%). Most reports reach FDA through the manufacturer, which must forward reports it receives.

Are reports for Amoxil rising?

3 reports in the 12 months to June 2026, up 50% from 2 in the 12 months before. FDA releases FAERS data quarterly, so the newest months are incomplete and grow in later releases. Counts also move with how many people take a product, its time on the market and publicity.

Do these reports show that Amoxil was responsible for these reactions?

No. FDA states that "a causal relationship cannot be established between product and reactions listed in a report" and that for any given report "there is no certainty that a suspected drug caused the event." The reaction may relate to the condition being treated, to other medicines, or to something else.

Is this a list of the side effects of Amoxil?

No. It is a count of what was reported to FDA. The adverse reactions observed in clinical studies are printed on the FDA-approved label, which a pharmacist or clinician can go through with you.

How do I report an adverse event?

Consumers and health professionals can report to FDA through MedWatch (Form FDA 3500 online, or 1-800-FDA-1088), or to the manufacturer, which must pass reports on. See the guide on how to report.

Where this comes from. Counts are built from the openFDA Drug Adverse Event (FAERS) bulk export released 28 Sep 2026, which holds reports FDA received through 30 Jun 2026. Drug names are as reported, resolved to the brand or generic name on the FDA label where openFDA's harmonisation matched them; classes are the pharmacologic class (EPC) from the label and the National Drug Code Directory of 17 Sep 2026. A report counts here when it lists Amoxil as a suspect or interacting product; reports listing it only as a concomitant medication (1,196) are excluded. No report narrative, lot number, patient detail or reporter identity is published. See the methodology and sources; FDA's record is authoritative, and corrections are handled within five working days.

Drug data (FAERS) through 30 Jun 2026; device data (MAUDE) through 31 Aug 2026. Not medical advice.